Combine the cream, sour milk, baking soda, eggs, and flour in a large bowl.
Add the salt and sugar.
Roll out to a 1 /4-inch thickness and cut up into any shapes as big as you wish, or into 2 by 4-inch pieces.
Cut a 2 ½-inch slit in the center of each cake.
Make sure the slit goes completely through the cake.
Heat the lard in a deep kettle or pan to a depth of about 2 inches until very hot.
Fry the cakes in batches until golden, about 1 minute on each side. Roll the cakes in a pan of sugar while still warm.